The 12mm wheel hex hub compatible with Mostly 1/10 RC Crawler Car,for example,it will compatible with Axial SCX10 HSP HPI Tamiya Redcat 1/10 RC Crawler Car.Does NOT compatible with TRX Slash axles.
RC 12mm drive hub are made of aluminum alloy,durable in use.
Fit mostly 1/10 RC Crawler Car,some Model Car need to drill the middle out.
A great replacement part for your rc car.
Easy to install and replace.

Item Name:12mm Wheel Hex Hub
Hex Diameter:12mm;
Thickness: 9mm/10mm /11mm/12mm(Optional)
Diameter of Hole: 4mm;
Color: Red/Black/Blue(Optional)
Package List:
4 x 12mm Wheel Hex Drive Hub